/Engine/Plugins/Enterprise/DatasmithImporter/Source/DatasmithImporter/Public/DatasmithImportContext.h
First part of the Init process, requires a call to SetupDestination and InitScene after that. Displays the options to the end-user (blocking call), and updates translator accordingly. When silent, Json options are parsed instead.
false if the user canceled -> import should not occurs in that case.
bool InitOptions ( const [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FJsonObject](API\Runtime\Json\Dom\FJsonObject) > & ImportSettingsJson, const [TOptional](API\Runtime\Core\IO\TOptional)< [FString](API\Runtime\Core\Containers\FString) > & InImportPath, bool bSilent )